The method of intelligent arc protection system to effectively reduce the damage of arc light is to cut off the fault power supply quickly. Arc protection is designed for this demand. Arc protection can quickly detect the appearance of arc light, reduce its burning time, reduce the loss of equipment and property, and protect the personal safety of staff.

In China's 35kV and below power system, the fast bus protection is not installed, but simple arc suppression device and transformer backup protection are used. These protections are low in intelligence and slow in response, which often delay the fault removal time, thus burning the switchgear, and even causing serious accidents, affecting the safe operation of the whole power grid.

Therefore, how to quickly cut off the fault current has become the focus at the moment of arc light generation. The emergence of intelligent arc protection device solves this problem.

One of the functional features of arc protection system produced by our company needs to be emphasized, that is, the whole group of arc protection system acts quickly, and the whole group reaction time is less than 20ms. It can judge the arc light change signal and current change signal in a short time and quickly export it to ensure that the arc light of the equipment in the switch cabinet is cut off within 20ms. The switch action time is generally 50 ~ 60ms, so the action time of arc protection device is less than the arc withstand time of switch cabinet, which will not cause serious damage to the switch cabinet.

To sum up, the arc short circuit fault can be removed within the arc withstand time standard of the existing switch cabinet by using the arc protection device, so as to greatly protect the workers nearby and prevent the switch device and other distribution equipment from damage.